scraped my wheel ... now what

I curbed my wheel yesterday as I was gingerly pulling into a parking space. Damnit! Anyhow, it's nothing huge. A nasty scape about an inch or two long right on the outermost edge of the rim.

I figured I'd just swap it out with the spare or even just leave it alone. It doesn't look *that* bad, but since I lease I'd probably switch w/ the spare before I turn it in. I've got about 6k miles on the wheels. Do I need to take my tire of my wheels to swap? If so, who would you recommend do the work? Or can I just put the spare on my car?

thanks